Chair arm



FIG. 1 if a front perspective view of a chair arm showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in FIG. 1 are for environmental purposes only and do not form a part of our design. 

The ornamental design for a chair arm, as shown and described. 